Aim To evaluate the effect of statin treatment on the arteral elastcity in patients with non-alcoholic fatty live disease（NAFLD）. Methods 135 cases with NAFLD were randomly divided into treatment group （atorvastatin 20 mg+life intervene，n 69） and control group（life intervene,n66），the period of the treatment is a half of one year. Results There were significant decrease in weight，cholesterol-level，the transaminase of live，the degree of fatty liver in two groups and there were significant decrease on brachial-ankle pulse wave velocity （Ba-PWV） in treatment group，no change happened in control group. So the effect of treatment group was superior to control group. Conclusion There is a significant effect of atorvastatin treatment on lipid-lowering，weight loss，improving the degree of fatty liver，reversing the arteral elastcity in patients with NAFLD.